Temporary tightening tool for fastening member
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKenji Nakagawa
Life of this patent
Estimating the term…
Abstract
A temporary tightening tool includes a grip part and a socket part into which a bolt head part is inserted. The socket part is formed in a shape of a hexagonal tube surrounded by six side walls, a hook part, which is a leaf spring part, is formed in each of alternate three side walls among the six side walls, and a thick torque transmission part is formed in each of three remaining side walls without the hook part. When the bolt head part is inserted in the socket part, the hook part is elastically deformed, and holds the hold bolt head part with restoring force. Torque input into the grip part is transmitted to the bolt head part from the torque transmission wall.
Claims5
A temporary tightening tool for a fastening member, which is used for temporarily tightening a fastening member that is a bolt or nut for fastening a tire wheel to a hub, comprising;
- a grip part for an operator to input torque, and
- a socket part formed at a tip of said grip part, into which a hexagonal columnar part formed at said fastening member is inserted, wherein:
- said socket part comprises;
- a leaf spring part which is pressed by a part of six side surfaces of said hexagonal columnar part to be elastically deformed outward in a radial direction of said hexagonal columnar part when said hexagonal columnar part is inserted in said socket part, and presses said part of said six side surfaces inward in the radial direction with restoring force to hold said hexagonal columnar part such that said hexagonal columnar part is clamped, and
- a torque transmission part which transmits torque to a side surface that is not pressed by said leaf spring part among said six side surfaces of said hexagonal columnar part when said torque is input into said grip part in a state where said hexagonal columnar part has been inserted in said socket part, wherein:
- said socket part is formed in a shape of a hexagonal tube surrounded by six side walls, two slits are formed a predetermined dimension away from each other in a width direction to reach a tip of said side wall along an axis direction in each of alternate three side walls among said six side walls,
- said leaf spring part is a plate body formed between said two slits, and
- said torque transmission part is prepared in each of three remaining side walls without said slits among said six side walls, in which a thick part with plate thickness thicker than said leaf spring part is formed.
A temporary tightening tool for a fastening member, which is used for temporarily tightening a fastening member that is a bolt or nut for fastening a tire wheel to a hub, comprising;
- a grip part for an operator to input torque, and
- a socket part formed at a tip of said grip part, into which a hexagonal columnar part formed at said fastening member is inserted, wherein:
- said socket part comprises;
- a leaf spring part which is pressed by a part of six side surfaces of said hexagonal columnar part to be elastically deformed outward in a radial direction of said hexagonal columnar part when said hexagonal columnar part is inserted in said socket part, and presses said part of said six side surfaces inward in the radial direction with restoring force to hold said hexagonal columnar part such that said hexagonal columnar part is clamped, and
- a torque transmission part which transmits torque to a side surface that is not pressed by said leaf spring part among said six side surfaces of said hexagonal columnar part when said torque is input into said grip part in a state where said hexagonal columnar part has been inserted in said socket part, wherein:
- said socket part comprises a socket substrate that is a metallic plate in a shape of a ring with an insertion hole, into which said hexagonal columnar part is inserted,
- said leaf spring part is formed in a shape which is bent from a plurality of predetermined positions in an inner periphery surrounding said insertion hole of said socket substrate to be extended in a direction, into which said hexagonal columnar part is inserted,
- said torque transmission part is formed at a position in said inner periphery of said socket substrate where said leaf spring part is not formed, and
- said grip part is formed in a shape which is bent from an outer periphery of said socket substrate to be extended in a direction, into which said hexagonal columnar part is inserted.
Dependencies are inferred from the claim text.